1 and 3 only because metal are easily to loss electron while non metal are difficult to loss electron that's why it called heavy elements.
The atomic radium increases to the left and downwards on the periodic table.
By that logic, Se has the largest radius.
All of them are soluble salt.
First one dissociates into two ions.
The second one dissociates into 3 ions.
The third dissociate into 4 ions. therefore, Al(NO3)3
The correct answer is B. Water that has condensed and formed water droplets on the ground, grass, and other outdoor objects is known as dew. It is water formed due to condensation in early morning or evening. It is formed when the temperature of the objects reach below the dew point of the air around.
